A Scotogenic Model with Two Inert Doublets

TL;DR

This paper introduces an extended scotogenic model with two inert doublets, generating neutrino masses at one-loop and accommodating both scalar and Majorana dark matter candidates, with distinctive collider signatures.

Contribution

It proposes a novel scotogenic model extension with two inert doublets, expanding the dark matter possibilities and predicting new collider signatures beyond the minimal model.

Findings

The model supports both Majorana and scalar dark matter within viable parameter space.

It satisfies all theoretical and experimental constraints including Higgs decay and lepton flavor violation.

Predicts unique collider signatures such as multi-jet and lepton final states.

Abstract

In this work, we present a scotogenic model, where the neutrino mass is generated at one-loop diagrams. The standard model (SM) is extended by three singlet Majorana fermions and two inert scalar doublets instead of one doublet as in the minimal scotogenic model. The model scalar sector includes two CP-even, two CP-odd and two charged scalars in addition to the Higgs. The dark matter (DM) candidate could be either the light Majorana fermion (Majorana DM), or the lightest among the CP-even and the CP-odd scalars (scalar DM). We show that the model accommodates both Majorana and scalar DM within a significant viable parameter space, while considering all the relevant theoretical and experimental constraints such as perturbativity, vacuum stability, unitarity, the di-photon Higgs decay, electroweak precision tests and lepton flavor violating constraints. In addition to the collider signatures predicted by the minimal scotogenic model, our model predicts some novel signatures that can be probed through some final states such as $8~jets+\slashed{E}_T$, $1\ell+4~jets+\slashed{E}_T$ and $4b+\slashed{E}_T$.